drm_debugfs.c

  1/*
  2 * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com
  3 *
  4 * Copyright 2008 Ben Gamari <bgamari@gmail.com>
  5 *
  6 * Permission is hereby granted, free of charge, to any person obtaining a
  7 * copy of this software and associated documentation files (the "Software"),
  8 * to deal in the Software without restriction, including without limitation
  9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 10 * and/or sell copies of the Software, and to permit persons to whom the
 11 * Software is furnished to do so, subject to the following conditions:
 12 *
 13 * The above copyright notice and this permission notice (including the next
 14 * paragraph) shall be included in all copies or substantial portions of the
 15 * Software.
 16 *
 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 23 * OTHER DEALINGS IN THE SOFTWARE.
 24 */
 25
 26#include <linux/debugfs.h>
 27#include <linux/export.h>
 28#include <linux/seq_file.h>
 29#include <linux/slab.h>
 30#include <linux/uaccess.h>
 31
 32#include <drm/drm_atomic.h>
 33#include <drm/drm_auth.h>
 34#include <drm/drm_bridge.h>
 35#include <drm/drm_debugfs.h>
 36#include <drm/drm_device.h>
 37#include <drm/drm_drv.h>
 38#include <drm/drm_edid.h>
 39#include <drm/drm_file.h>
 40#include <drm/drm_gem.h>
 41#include <drm/drm_managed.h>
 42#include <drm/drm_gpuvm.h>
 43
 44#include "drm_crtc_internal.h"
 45#include "drm_internal.h"
 46
 47static struct dentry *accel_debugfs_root;
 48static struct dentry *drm_debugfs_root;
 49
 50/***************************************************
 51 * Initialization, etc.
 52 **************************************************/
 53
 54static int drm_name_info(struct seq_file *m, void *data)
 55{
 56	struct drm_debugfs_entry *entry = m->private;
 57	struct drm_device *dev = entry->dev;
 58	struct drm_master *master;
 59
 60	mutex_lock(&dev->master_mutex);
 61	master = dev->master;
 62	seq_printf(m, "%s", dev->driver->name);
 63	if (dev->dev)
 64		seq_printf(m, " dev=%s", dev_name(dev->dev));
 65	if (master && master->unique)
 66		seq_printf(m, " master=%s", master->unique);
 67	if (dev->unique)
 68		seq_printf(m, " unique=%s", dev->unique);
 69	seq_printf(m, "\n");
 70	mutex_unlock(&dev->master_mutex);
 71
 72	return 0;
 73}
 74
 75static int drm_clients_info(struct seq_file *m, void *data)
 76{
 77	struct drm_debugfs_entry *entry = m->private;
 78	struct drm_device *dev = entry->dev;
 79	struct drm_file *priv;
 80	kuid_t uid;
 81
 82	seq_printf(m,
 83		   "%20s %5s %3s master a %5s %10s %*s %20s\n",
 84		   "command",
 85		   "tgid",
 86		   "dev",
 87		   "uid",
 88		   "magic",
 89		   DRM_CLIENT_NAME_MAX_LEN,
 90		   "name",
 91		   "id");
 92
 93	/* dev->filelist is sorted youngest first, but we want to present
 94	 * oldest first (i.e. kernel, servers, clients), so walk backwardss.
 95	 */
 96	mutex_lock(&dev->filelist_mutex);
 97	list_for_each_entry_reverse(priv, &dev->filelist, lhead) {
 98		bool is_current_master = drm_is_current_master(priv);
 99		struct task_struct *task;
100		struct pid *pid;
101
102		mutex_lock(&priv->client_name_lock);
103		rcu_read_lock(); /* Locks priv->pid and pid_task()->comm! */
104		pid = rcu_dereference(priv->pid);
105		task = pid_task(pid, PIDTYPE_TGID);
106		uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
107		seq_printf(m, "%20s %5d %3d   %c    %c %5d %10u %*s %20llu\n",
108			   task ? task->comm : "<unknown>",
109			   pid_vnr(pid),
110			   priv->minor->index,
111			   is_current_master ? 'y' : 'n',
112			   priv->authenticated ? 'y' : 'n',
113			   from_kuid_munged(seq_user_ns(m), uid),
114			   priv->magic,
115			   DRM_CLIENT_NAME_MAX_LEN,
116			   priv->client_name ? priv->client_name : "<unset>",
117			   priv->client_id);
118		rcu_read_unlock();
119		mutex_unlock(&priv->client_name_lock);
120	}
121	mutex_unlock(&dev->filelist_mutex);
122	return 0;
123}
124
125static int drm_gem_one_name_info(int id, void *ptr, void *data)
126{
127	struct drm_gem_object *obj = ptr;
128	struct seq_file *m = data;
129
130	seq_printf(m, "%6d %8zd %7d %8d\n",
131		   obj->name, obj->size,
132		   obj->handle_count,
133		   kref_read(&obj->refcount));
134	return 0;
135}
136
137static int drm_gem_name_info(struct seq_file *m, void *data)
138{
139	struct drm_debugfs_entry *entry = m->private;
140	struct drm_device *dev = entry->dev;
141
142	seq_printf(m, "  name     size handles refcount\n");
143
144	mutex_lock(&dev->object_name_lock);
145	idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
146	mutex_unlock(&dev->object_name_lock);
147
148	return 0;
149}
150
151static const struct drm_debugfs_info drm_debugfs_list[] = {
152	{"name", drm_name_info, 0},
153	{"clients", drm_clients_info, 0},
154	{"gem_names", drm_gem_name_info, DRIVER_GEM},
155};
156#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
157
158
159static int drm_debugfs_open(struct inode *inode, struct file *file)
160{
161	struct drm_info_node *node = inode->i_private;
162
163	if (!device_is_registered(node->minor->kdev))
164		return -ENODEV;
165
166	return single_open(file, node->info_ent->show, node);
167}
168
169static int drm_debugfs_entry_open(struct inode *inode, struct file *file)
170{
171	struct drm_debugfs_entry *entry = inode->i_private;
172	struct drm_debugfs_info *node = &entry->file;
173	struct drm_minor *minor = entry->dev->primary ?: entry->dev->accel;
174
175	if (!device_is_registered(minor->kdev))
176		return -ENODEV;
177
178	return single_open(file, node->show, entry);
179}
180
181static const struct file_operations drm_debugfs_entry_fops = {
182	.owner = THIS_MODULE,
183	.open = drm_debugfs_entry_open,
184	.read = seq_read,
185	.llseek = seq_lseek,
186	.release = single_release,
187};
188
189static const struct file_operations drm_debugfs_fops = {
190	.owner = THIS_MODULE,
191	.open = drm_debugfs_open,
192	.read = seq_read,
193	.llseek = seq_lseek,
194	.release = single_release,
195};
196
197/**
198 * drm_debugfs_gpuva_info - dump the given DRM GPU VA space
199 * @m: pointer to the &seq_file to write
200 * @gpuvm: the &drm_gpuvm representing the GPU VA space
201 *
202 * Dumps the GPU VA mappings of a given DRM GPU VA manager.
203 *
204 * For each DRM GPU VA space drivers should call this function from their
205 * &drm_info_list's show callback.
206 *
207 * Returns: 0 on success, -ENODEV if the &gpuvm is not initialized
208 */
209int drm_debugfs_gpuva_info(struct seq_file *m,
210			   struct drm_gpuvm *gpuvm)
211{
212	struct drm_gpuva *va, *kva = &gpuvm->kernel_alloc_node;
213
214	if (!gpuvm->name)
215		return -ENODEV;
216
217	seq_printf(m, "DRM GPU VA space (%s) [0x%016llx;0x%016llx]\n",
218		   gpuvm->name, gpuvm->mm_start, gpuvm->mm_start + gpuvm->mm_range);
219	seq_printf(m, "Kernel reserved node [0x%016llx;0x%016llx]\n",
220		   kva->va.addr, kva->va.addr + kva->va.range);
221	seq_puts(m, "\n");
222	seq_puts(m, " VAs | start              | range              | end                | object             | object offset\n");
223	seq_puts(m, "-------------------------------------------------------------------------------------------------------------\n");
224	drm_gpuvm_for_each_va(va, gpuvm) {
225		if (unlikely(va == kva))
226			continue;
227
228		seq_printf(m, "     | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n",
229			   va->va.addr, va->va.range, va->va.addr + va->va.range,
230			   (u64)(uintptr_t)va->gem.obj, va->gem.offset);
231	}
232
233	return 0;
234}
235EXPORT_SYMBOL(drm_debugfs_gpuva_info);
236
237/**
238 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
239 * 			minor
240 * @files: The array of files to create
241 * @count: The number of files given
242 * @root: DRI debugfs dir entry.
243 * @minor: device minor number
244 *
245 * Create a given set of debugfs files represented by an array of
246 * &struct drm_info_list in the given root directory. These files will be removed
247 * automatically on drm_debugfs_dev_fini().
248 */
249void drm_debugfs_create_files(const struct drm_info_list *files, int count,
250			      struct dentry *root, struct drm_minor *minor)
251{
252	struct drm_device *dev = minor->dev;
253	struct drm_info_node *tmp;
254	int i;
255
256	for (i = 0; i < count; i++) {
257		u32 features = files[i].driver_features;
258
259		if (features && !drm_core_check_all_features(dev, features))
260			continue;
261
262		tmp = drmm_kzalloc(dev, sizeof(*tmp), GFP_KERNEL);
263		if (tmp == NULL)
264			continue;
265
266		tmp->minor = minor;
267		tmp->dent = debugfs_create_file(files[i].name,
268						0444, root, tmp,
269						&drm_debugfs_fops);
270		tmp->info_ent = &files[i];
271	}
272}
273EXPORT_SYMBOL(drm_debugfs_create_files);
274
275int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
276			     struct dentry *root, struct drm_minor *minor)
277{
278	int i;
279
280	for (i = 0; i < count; i++) {
281		struct dentry *dent = debugfs_lookup(files[i].name, root);
282
283		if (!dent)
284			continue;
285
286		drmm_kfree(minor->dev, d_inode(dent)->i_private);
287		debugfs_remove(dent);
288	}
289	return 0;
290}
291EXPORT_SYMBOL(drm_debugfs_remove_files);
292
293void drm_debugfs_bridge_params(void)
294{
295	drm_bridge_debugfs_params(drm_debugfs_root);
296}
297
298void drm_debugfs_init_root(void)
299{
300	drm_debugfs_root = debugfs_create_dir("dri", NULL);
301#if IS_ENABLED(CONFIG_DRM_ACCEL)
302	accel_debugfs_root = debugfs_create_dir("accel", NULL);
303#endif
304}
305
306void drm_debugfs_remove_root(void)
307{
308#if IS_ENABLED(CONFIG_DRM_ACCEL)
309	debugfs_remove(accel_debugfs_root);
310#endif
311	debugfs_remove(drm_debugfs_root);
312}
313
314static int drm_debugfs_proc_info_show(struct seq_file *m, void *unused)
315{
316	struct pid *pid;
317	struct task_struct *task;
318	struct drm_file *file = m->private;
319
320	if (!file)
321		return -EINVAL;
322
323	rcu_read_lock();
324	pid = rcu_dereference(file->pid);
325	task = pid_task(pid, PIDTYPE_TGID);
326
327	seq_printf(m, "pid: %d\n", task ? task->pid : 0);
328	seq_printf(m, "comm: %s\n", task ? task->comm : "Unset");
329	rcu_read_unlock();
330	return 0;
331}
332
333static int drm_debufs_proc_info_open(struct inode *inode, struct file *file)
334{
335	return single_open(file, drm_debugfs_proc_info_show, inode->i_private);
336}
337
338static const struct file_operations drm_debugfs_proc_info_fops = {
339	.owner = THIS_MODULE,
340	.open = drm_debufs_proc_info_open,
341	.read = seq_read,
342	.llseek = seq_lseek,
343	.release = single_release,
344};
345
346/**
347 * drm_debugfs_clients_add - Add a per client debugfs directory
348 * @file: drm_file for a client
349 *
350 * Create the debugfs directory for each client. This will be used to populate
351 * driver specific data for each client.
352 *
353 * Also add the process information debugfs file for each client to tag
354 * which client belongs to which process.
355 */
356void drm_debugfs_clients_add(struct drm_file *file)
357{
358	char *client;
359
360	client = kasprintf(GFP_KERNEL, "client-%llu", file->client_id);
361	if (!client)
362		return;
363
364	/* Create a debugfs directory for the client in root on drm debugfs */
365	file->debugfs_client = debugfs_create_dir(client, drm_debugfs_root);
366	kfree(client);
367
368	debugfs_create_file("proc_info", 0444, file->debugfs_client, file,
369			    &drm_debugfs_proc_info_fops);
370
371	client = kasprintf(GFP_KERNEL, "../%s", file->minor->dev->unique);
372	if (!client)
373		return;
374
375	/* Create a link from client_id to the drm device this client id belongs to */
376	debugfs_create_symlink("device", file->debugfs_client, client);
377	kfree(client);
378}
379
380/**
381 * drm_debugfs_clients_remove - removes all debugfs directories and files
382 * @file: drm_file for a client
383 *
384 * Removes the debugfs directories recursively from the client directory.
385 *
386 * There is also a possibility that debugfs files are open while the drm_file
387 * is released.
388 */
389void drm_debugfs_clients_remove(struct drm_file *file)
390{
391	debugfs_remove_recursive(file->debugfs_client);
392	file->debugfs_client = NULL;
393}
394
395/**
396 * drm_debugfs_dev_init - create debugfs directory for the device
397 * @dev: the device which we want to create the directory for
398 *
399 * Creates the debugfs directory for the device under the given root directory.
400 */
401void drm_debugfs_dev_init(struct drm_device *dev)
402{
403	if (drm_core_check_feature(dev, DRIVER_COMPUTE_ACCEL))
404		dev->debugfs_root = debugfs_create_dir(dev->unique, accel_debugfs_root);
405	else
406		dev->debugfs_root = debugfs_create_dir(dev->unique, drm_debugfs_root);
407}
408
409/**
410 * drm_debugfs_dev_fini - cleanup debugfs directory
411 * @dev: the device to cleanup the debugfs stuff
412 *
413 * Remove the debugfs directory, might be called multiple times.
414 */
415void drm_debugfs_dev_fini(struct drm_device *dev)
416{
417	debugfs_remove_recursive(dev->debugfs_root);
418	dev->debugfs_root = NULL;
419}
420
421void drm_debugfs_dev_register(struct drm_device *dev)
422{
423	drm_debugfs_add_files(dev, drm_debugfs_list, DRM_DEBUGFS_ENTRIES);
424
425	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
426		drm_framebuffer_debugfs_init(dev);
427		drm_client_debugfs_init(dev);
428	}
429	if (drm_drv_uses_atomic_modeset(dev))
430		drm_atomic_debugfs_init(dev);
431}
432
433int drm_debugfs_register(struct drm_minor *minor, int minor_id)
434{
435	struct drm_device *dev = minor->dev;
436	char name[64];
437
438	sprintf(name, "%d", minor_id);
439	minor->debugfs_symlink = debugfs_create_symlink(name, drm_debugfs_root,
440							dev->unique);
441
442	/* TODO: Only for compatibility with drivers */
443	minor->debugfs_root = dev->debugfs_root;
444
445	if (dev->driver->debugfs_init && dev->render != minor)
446		dev->driver->debugfs_init(minor);
447
448	return 0;
449}
450
451void drm_debugfs_unregister(struct drm_minor *minor)
452{
453	debugfs_remove(minor->debugfs_symlink);
454	minor->debugfs_symlink = NULL;
455}
456
457/**
458 * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list
459 * @dev: drm device for the ioctl
460 * @name: debugfs file name
461 * @show: show callback
462 * @data: driver-private data, should not be device-specific
463 *
464 * Add a given file entry to the DRM device debugfs file list to be created on
465 * drm_debugfs_init.
466 */
467void drm_debugfs_add_file(struct drm_device *dev, const char *name,
468			  int (*show)(struct seq_file*, void*), void *data)
469{
470	struct drm_debugfs_entry *entry = drmm_kzalloc(dev, sizeof(*entry), GFP_KERNEL);
471
472	if (!entry)
473		return;
474
475	entry->file.name = name;
476	entry->file.show = show;
477	entry->file.data = data;
478	entry->dev = dev;
479
480	debugfs_create_file(name, 0444, dev->debugfs_root, entry,
481			    &drm_debugfs_entry_fops);
482}
483EXPORT_SYMBOL(drm_debugfs_add_file);
484
485/**
486 * drm_debugfs_add_files - Add an array of files to the DRM device debugfs file list
487 * @dev: drm device for the ioctl
488 * @files: The array of files to create
489 * @count: The number of files given
490 *
491 * Add a given set of debugfs files represented by an array of
492 * &struct drm_debugfs_info in the DRM device debugfs file list.
493 */
494void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info *files, int count)
495{
496	int i;
497
498	for (i = 0; i < count; i++)
499		drm_debugfs_add_file(dev, files[i].name, files[i].show, files[i].data);
500}
501EXPORT_SYMBOL(drm_debugfs_add_files);
502
503static int connector_show(struct seq_file *m, void *data)
504{
505	struct drm_connector *connector = m->private;
506
507	seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
508
509	return 0;
510}
511
512static int connector_open(struct inode *inode, struct file *file)
513{
514	struct drm_connector *dev = inode->i_private;
515
516	return single_open(file, connector_show, dev);
517}
518
519static ssize_t connector_write(struct file *file, const char __user *ubuf,
520			       size_t len, loff_t *offp)
521{
522	struct seq_file *m = file->private_data;
523	struct drm_connector *connector = m->private;
524	char buf[12];
525
526	if (len > sizeof(buf) - 1)
527		return -EINVAL;
528
529	if (copy_from_user(buf, ubuf, len))
530		return -EFAULT;
531
532	buf[len] = '\0';
533
534	if (sysfs_streq(buf, "on"))
535		connector->force = DRM_FORCE_ON;
536	else if (sysfs_streq(buf, "digital"))
537		connector->force = DRM_FORCE_ON_DIGITAL;
538	else if (sysfs_streq(buf, "off"))
539		connector->force = DRM_FORCE_OFF;
540	else if (sysfs_streq(buf, "unspecified"))
541		connector->force = DRM_FORCE_UNSPECIFIED;
542	else
543		return -EINVAL;
544
545	return len;
546}
547
548static int edid_show(struct seq_file *m, void *data)
549{
550	return drm_edid_override_show(m->private, m);
551}
552
553static int edid_open(struct inode *inode, struct file *file)
554{
555	struct drm_connector *dev = inode->i_private;
556
557	return single_open(file, edid_show, dev);
558}
559
560static ssize_t edid_write(struct file *file, const char __user *ubuf,
561			  size_t len, loff_t *offp)
562{
563	struct seq_file *m = file->private_data;
564	struct drm_connector *connector = m->private;
565	char *buf;
566	int ret;
567
568	buf = memdup_user(ubuf, len);
569	if (IS_ERR(buf))
570		return PTR_ERR(buf);
571
572	if (len == 5 && !strncmp(buf, "reset", 5))
573		ret = drm_edid_override_reset(connector);
574	else
575		ret = drm_edid_override_set(connector, buf, len);
576
577	kfree(buf);
578
579	return ret ? ret : len;
580}
581
582/*
583 * Returns the min and max vrr vfreq through the connector's debugfs file.
584 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
585 */
586static int vrr_range_show(struct seq_file *m, void *data)
587{
588	struct drm_connector *connector = m->private;
589
590	if (connector->status != connector_status_connected)
591		return -ENODEV;
592
593	seq_printf(m, "Min: %u\n", connector->display_info.monitor_range.min_vfreq);
594	seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq);
595
596	return 0;
597}
598DEFINE_SHOW_ATTRIBUTE(vrr_range);
599
600/*
601 * Returns Connector's max supported bpc through debugfs file.
602 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc
603 */
604static int output_bpc_show(struct seq_file *m, void *data)
605{
606	struct drm_connector *connector = m->private;
607
608	if (connector->status != connector_status_connected)
609		return -ENODEV;
610
611	seq_printf(m, "Maximum: %u\n", connector->display_info.bpc);
612
613	return 0;
614}
615DEFINE_SHOW_ATTRIBUTE(output_bpc);
616
617static const struct file_operations drm_edid_fops = {
618	.owner = THIS_MODULE,
619	.open = edid_open,
620	.read = seq_read,
621	.llseek = seq_lseek,
622	.release = single_release,
623	.write = edid_write
624};
625
626
627static const struct file_operations drm_connector_fops = {
628	.owner = THIS_MODULE,
629	.open = connector_open,
630	.read = seq_read,
631	.llseek = seq_lseek,
632	.release = single_release,
633	.write = connector_write
634};
635
636static ssize_t
637audio_infoframe_read(struct file *filp, char __user *ubuf, size_t count, loff_t *ppos)
638{
639	struct drm_connector_hdmi_infoframe *infoframe;
640	struct drm_connector *connector;
641	union hdmi_infoframe *frame;
642	u8 buf[HDMI_INFOFRAME_SIZE(AUDIO)];
643	ssize_t len = 0;
644
645	connector = filp->private_data;
646	mutex_lock(&connector->hdmi.infoframes.lock);
647
648	infoframe = &connector->hdmi.infoframes.audio;
649	if (!infoframe->set)
650		goto out;
651
652	frame = &infoframe->data;
653	len = hdmi_infoframe_pack(frame, buf, sizeof(buf));
654	if (len < 0)
655		goto out;
656
657	len = simple_read_from_buffer(ubuf, count, ppos, buf, len);
658
659out:
660	mutex_unlock(&connector->hdmi.infoframes.lock);
661	return len;
662}
663
664static const struct file_operations audio_infoframe_fops = {
665	.owner   = THIS_MODULE,
666	.open    = simple_open,
667	.read    = audio_infoframe_read,
668};
669
670static int create_hdmi_audio_infoframe_file(struct drm_connector *connector,
671					    struct dentry *parent)
672{
673	struct dentry *file;
674
675	file = debugfs_create_file("audio", 0400, parent, connector, &audio_infoframe_fops);
676	if (IS_ERR(file))
677		return PTR_ERR(file);
678
679	return 0;
680}
681
682#define DEFINE_INFOFRAME_FILE(_f) \
683static ssize_t _f##_read_infoframe(struct file *filp, \
684				   char __user *ubuf, \
685				   size_t count,      \
686				   loff_t *ppos)      \
687{ \
688	struct drm_connector_hdmi_infoframe *infoframe; \
689	struct drm_connector_state *conn_state; \
690	struct drm_connector *connector; \
691	union hdmi_infoframe *frame; \
692	struct drm_device *dev; \
693	u8 buf[HDMI_INFOFRAME_SIZE(MAX)]; \
694	ssize_t len = 0; \
695	\
696	connector = filp->private_data; \
697	dev = connector->dev; \
698	\
699	drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); \
700	\
701	conn_state = connector->state; \
702	infoframe = &conn_state->hdmi.infoframes._f; \
703	if (!infoframe->set) \
704		goto out; \
705	\
706	frame = &infoframe->data; \
707	len = hdmi_infoframe_pack(frame, buf, sizeof(buf)); \
708	if (len < 0) \
709		goto out; \
710	\
711	len = simple_read_from_buffer(ubuf, count, ppos, buf, len); \
712	\
713out: \
714	drm_modeset_unlock(&dev->mode_config.connection_mutex); \
715	return len; \
716} \
717\
718static const struct file_operations _f##_infoframe_fops = { \
719	.owner = THIS_MODULE, \
720	.open = simple_open, \
721	.read = _f##_read_infoframe, \
722}; \
723\
724static int create_hdmi_## _f ## _infoframe_file(struct drm_connector *connector, \
725						struct dentry *parent) \
726{ \
727	struct dentry *file; \
728	\
729	file = debugfs_create_file(#_f, 0400, parent, connector, &_f ## _infoframe_fops); \
730	if (IS_ERR(file)) \
731		return PTR_ERR(file); \
732	\
733	return 0; \
734}
735
736DEFINE_INFOFRAME_FILE(avi);
737DEFINE_INFOFRAME_FILE(hdmi);
738DEFINE_INFOFRAME_FILE(hdr_drm);
739DEFINE_INFOFRAME_FILE(spd);
740
741static int create_hdmi_infoframe_files(struct drm_connector *connector,
742				       struct dentry *parent)
743{
744	int ret;
745
746	ret = create_hdmi_audio_infoframe_file(connector, parent);
747	if (ret)
748		return ret;
749
750	ret = create_hdmi_avi_infoframe_file(connector, parent);
751	if (ret)
752		return ret;
753
754	ret = create_hdmi_hdmi_infoframe_file(connector, parent);
755	if (ret)
756		return ret;
757
758	ret = create_hdmi_hdr_drm_infoframe_file(connector, parent);
759	if (ret)
760		return ret;
761
762	ret = create_hdmi_spd_infoframe_file(connector, parent);
763	if (ret)
764		return ret;
765
766	return 0;
767}
768
769static void hdmi_debugfs_add(struct drm_connector *connector)
770{
771	struct dentry *dir;
772
773	if (!(connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
774	      connector->connector_type == DRM_MODE_CONNECTOR_HDMIB))
775		return;
776
777	dir = debugfs_create_dir("infoframes", connector->debugfs_entry);
778	if (IS_ERR(dir))
779		return;
780
781	create_hdmi_infoframe_files(connector, dir);
782}
783
784void drm_debugfs_connector_add(struct drm_connector *connector)
785{
786	struct drm_device *dev = connector->dev;
787	struct dentry *root;
788
789	if (!dev->debugfs_root)
790		return;
791
792	root = debugfs_create_dir(connector->name, dev->debugfs_root);
793	connector->debugfs_entry = root;
794
795	/* force */
796	debugfs_create_file("force", 0644, root, connector,
797			    &drm_connector_fops);
798
799	/* edid */
800	debugfs_create_file("edid_override", 0644, root, connector,
801			    &drm_edid_fops);
802
803	/* vrr range */
804	debugfs_create_file("vrr_range", 0444, root, connector,
805			    &vrr_range_fops);
806
807	/* max bpc */
808	debugfs_create_file("output_bpc", 0444, root, connector,
809			    &output_bpc_fops);
810
811	hdmi_debugfs_add(connector);
812
813	if (connector->funcs->debugfs_init)
814		connector->funcs->debugfs_init(connector, root);
815}
816
817void drm_debugfs_connector_remove(struct drm_connector *connector)
818{
819	if (!connector->debugfs_entry)
820		return;
821
822	debugfs_remove_recursive(connector->debugfs_entry);
823
824	connector->debugfs_entry = NULL;
825}
826
827void drm_debugfs_crtc_add(struct drm_crtc *crtc)
828{
829	struct drm_device *dev = crtc->dev;
830	struct dentry *root;
831	char *name;
832
833	name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
834	if (!name)
835		return;
836
837	root = debugfs_create_dir(name, dev->debugfs_root);
838	kfree(name);
839
840	crtc->debugfs_entry = root;
841
842	drm_debugfs_crtc_crc_add(crtc);
843}
844
845void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
846{
847	debugfs_remove_recursive(crtc->debugfs_entry);
848	crtc->debugfs_entry = NULL;
849}
850
851void drm_debugfs_encoder_add(struct drm_encoder *encoder)
852{
853	struct drm_minor *minor = encoder->dev->primary;
854	struct dentry *root;
855	char *name;
856
857	name = kasprintf(GFP_KERNEL, "encoder-%d", encoder->index);
858	if (!name)
859		return;
860
861	root = debugfs_create_dir(name, minor->debugfs_root);
862	kfree(name);
863
864	encoder->debugfs_entry = root;
865
866	drm_bridge_debugfs_encoder_params(root, encoder);
867
868	if (encoder->funcs && encoder->funcs->debugfs_init)
869		encoder->funcs->debugfs_init(encoder, root);
870}
871
872void drm_debugfs_encoder_remove(struct drm_encoder *encoder)
873{
874	debugfs_remove_recursive(encoder->debugfs_entry);
875	encoder->debugfs_entry = NULL;
876}